Steel, D. (1979). Summer's end. Sphere.
Chicago-čujuhus (17. p.)Steel, Daniel. Summer's End. London: Sphere, 1979.
MLA-čujuhus (9. p.)Steel, Daniel. Summer's End. Sphere, 1979.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.